Rib-knitting machine.



L. N. D. WiLLiAMS.

BIB KNITTWG MACHiNE.

APPLICATION men JUNE 28. 19:1.

Patented Apr. 27, 1915.

3 HEETSSHEET I.

lNVENTOR LOLHS N. D. WiLLlAMS BY HIS ATTORNEY WITNEIS SE5 65140 J L. N. D. WILLIAMS.

RIB KNITTING MACHINE.

APPLICATlON FILED JUNE 23, m1

1 137,561 Patented Apr. 27', 1915.

WITNESSES 572 INVENTOR LOUtS N o. WILLIAMS av Hus ATTORNEY MM L. N, D. WILLIAMS.

RIB KNlTTiNG MACHINE.

APPLICATION FILED JUNE 28.1911.

3 SHEE\SSHET 3.

NVENTOR LOLHS' N. D. WHJJAMS Patented Apr. 27, 1915.

BY Hi5 ATTORNEY UNITED STATES PATENT-OFFICE.

LOUIS N. D. WILLIAMS, 0F OGONTZ, PENNSYLVANIA, ASSIGNOB. TO SCOTT & WILLIAMS, INCORPORATED,.OF OGONTZ, PENNSYLVANIA, A CORPORATION OF NEW JEBQEY.

BIB-KNITTING MACHINE.

Application filed June 28, 1911.

To all whom it may concern Be it known that I, Louis N. D. WILLIAMS, a citizen of the United States, residing in Ogontz, Montgomery county, Pennsylvania, have invented certain Improvements in Rib- Knitting Machines, of which the following is a specification.

The object of my invention is to so co nstrnct a machine for knitting ribbed fabrics cams and also showing the undersides of two of the yarn feeding devices; Fig. 2-18 3.

view showing. in a flat plane, one of the sections of the ring which carries the cams for operating the cylinder and showing also the inner side of one of the yarn feeds; Fig. 3 is a similar view of another section of said cam ring, and showing also the inner side of the other yarn feed; Fig. 4 is a sectional view of part of the cum cylinder and dial of the machine with a cylinder and dial needle illustrating the latch interference which my invention is intended to prevent; Fig. 5 illustrates the cylinder and dial needles in the relation to each other shown in Fig. 4, and Figs. 6 to 15, inclusive, are views showing parts of the cylinder and dial and cylinder and dial needles in the relations which they assume to each other at different times in the operation of the machine.

As will be understood on reference to the patents before referred to the fabric in question is formed by placing in the cam carriers, cams of such formation that they will have an alternating primary and secondary action upon the needles.

In knitting fine gage fabric with the arrangement 0f cams shown in Patent 951,706, latch contact is liable to take place, as shown in Figs. 4 and 5, because of the retraction of the primary needle while the secondary needle is still projected.

In knitting machines there is always more or less lateral displacement of the spoon of the latch when the same is closing, such dis- Patented Apr. 27, 1915.

Serial No. 635,882.

placement being due to the sidewisc movement of the needles under the thrust of the cams upon the butts, to the play of the needles in their grooves, and to the play of the latch in its slot, and, in fine gage ma chines of the type to which I have referred, this lateral displacement is frequently such that the closing latch of the retracting primar needle will strike the back of the still proJected secondary needle with resultant injury to or'breakage of the latch, which renders its needle incapable of performing its proper function in the further operation ofthe machine.

My present invention consists in so opernting the primary and secondary needles that the liabilty of latch interference will" be overcoine.

On reference to Figs. 1, 2 audit, it will be noted that the cam 1 of the dial cam cap is a primary cam, the cam 3 of said dial cam ca is a secondary cam, the cam 52 of the cy inder cam ring is a secondary cam and the cum 4 of said cylinder cam ring is a primary cam, and these parts are located in the machine with reference to each other as indicated by d, e',f 9', so that the primary cam 1 of the dial cam cap acts in conjunction with the secondary cam 2 of the\ cylinder cam ring and the primary cam 4 of said cylinder cam ring acts in conjunction with the secondary earn 3 of the dial cam cap.

When the needles are at station a, the hook of the .dial needle is slightly outside of the edge of the dial and the hook of the cylinder needle is slightly beyond the upper edge of the cylinder, as shown in Fig, 6. At station b the dial needle has been projected sufiiciently to oiuse the stitch thereon to open the latch, as shown in Fig. 7, and has then been retracted, as shown in Fig. 8, and held in the retracted position until station 0 is reached, at which point the cylinder needle has been projected so as to cause the stitch upon it to open its latch, as shown in Fig. 8, pro'ection of each needle so as to open its latch eing efi'ected while the other needle was retracted so that there can be no lie.- bility of latch interference at this stage of the operation.

At station at the dial needles have been fully projected, as shown in Fig. 9. the cylinder needles retaining the same position as at station 0. At this point the yarn is fed the lines a, b, a, d, e, f, g, a, b, c,

to the dial needles by the yarn guide as which carries a latch closer .2), whereby, as the dial needle is retracted, its latch will be closed by said member an of the yarn guide before it reaches the cylinder needle.

At station 6 the dial needle has been fully retracted so as to cast off its stitch and draw a new loop, but before said retraction ofthe dial needle is completed, the cylinder needle has been lowered slightly, as shown in Fig. 10, by the depression in the cylinder cam, between the stations d and e, and the yarn between the dial loops is laid over the open latches of the intervening cylinder needles.

At station f the cylinder needle has been fully retracted so as to cast its stitch and draw a new loop, the closing of the latch not being interfered with, as the dial needle is still retracted, hav'in only been eased up slightly, as shown in Fig. 11, so as to again assume the starting position shown in Fig. 6, and at station g the cylinder needle has also been slacked up slightly so that bothneedles are now again in the position shown in 6. l t stations 0 and b the needles bear the same relation to each other as at stations a and 1; represented in Figs. 6 and 7, but at station a the c linder needles have been projected to the all extent, as shown in Fig. 12, the dial needles still remaining in the .retracted position to which they have been moved after having been projected, as shown in Fig. 7, so as to open their latches.

Ati station d the dial needles have also been fully projected, as shown in- Fig. 13, and the yarn guide y is feeding the yarn towthefneedles, said yarn guide hating a latch closer 3 which enga es with the latches of the cylinder need es and closes the same when said needles are being re-- tracted in passing from the station (1 to the station 0', the dial needles at the same time being slightly retracted, so that the yarn be:

tween the new loops drawn by the cylinder needles will be laid over the latches of the ,dial needles, the parts when they reach the station e being in .the position shown in Fig. 1a. While the dial needle is'being fully retracted in passing from station (2 to station f the cylinder needle will be slightly projected so as to slack up the stitch upon it, as shown in Fig. 15, and will be retained in that position while the dial needle is being similarly slacked up in passing from station f to station g, the parts being now again in the position shown in Fig. 6, preparatory to a repetition of the operations described.

At no stage in the operation of my improved machine is there any chance for in terferencc either of an opening or closing latch of one needle by contact with an adjoining needle, consequently the difliculties heretofore ex erienced in; the operation of machines of t ie type to which my invention relates are effectually overcome.

I claim: The combination, in a knitting machine, of needle carriers having needles sordisposed that the planes of movement of the needles cross each other, with a latch closer for one set of said needles, means for advancing said set of needles to such extent that said latch closer can operate in front of theother set of needles, and came for operating the latter at of needles so that they will first clear their stitches and then be withdrawn sulficiently to receive the yarn on their latches as the stitches are drawn by the first set ofineedles.

In testimony whereof, I have signed my name to this specification, in the presence of: two subscribing witnesses.

LOUIS N. D. WILLIAMS.

\Vitnesses:

LEONA G. W mnu, FANNY Lnnon.

It is hereby certified that the residence of the assignee in Letters Patent Nov 1,137,561, granted April 2'1, 1915, upon the application of Louis N. D. Williams, of Ogontz, Pennsylvania, for an improvement in RibKnitting Machines, was erroneously given as Ogontz, Pennsylvania," whereas said residence should have been gii'un es Camden, New Jersey, as shown by the records of assignments in this ofiice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent 063%. v

Signed and sealed this 11th day of May, A. D., 1915.

R. F. WHITEHEAD,

Acting Commissioner of Patents.

[SEAL] 

